论文部分内容阅读
以钒渣钠化焙烧工艺得到的碱性钒净化液为原料,分析了溶液中V、Na以及杂质Si、P的含量,研究了三聚氰胺代替常规铵盐作为沉淀剂的酸性铵盐沉钒新工艺,并探讨了溶液中Na含量对沉钒效果的影响。结果表明:采用三聚氰胺沉钒,在沉钒剂用量n(C_3H_6N_6)/n(TV)=0.3、pH=2.0、沉钒温度90℃及沉钒时间45 min的条件下,沉钒率大于98%,得到的钒沉淀物经500℃煅烧3 h,可以获得满足标准的粉状V_2O_5,且沉钒废水中V和NH_4~+含量极低,简化了后续的废水处理工序。该工艺适合于n[Na]/n[V]≤5.0的溶液体系,试验效果良好。
The vanadium slag sodium roasting process obtained alkaline vanadium purification solution as raw materials, the solution of V, Na and impurities Si, P content, the study of melamine instead of conventional ammonium salt as a precipitating agent of ammonium salt Shen vanadium new technology , And discussed the effect of Na content in solution on vanadium precipitation. The results showed that vanadium precipitated by melamine increased the vanadium deposition rate by more than 98% at the dosage of vanadium (C 3 H 6 N 6) / n (TV) = 0.3, pH = 2.0, immersed vanadium temperature 90 ℃ and vanadium immersion time 45 min. , The obtained vanadium precipitate was calcined at 500 ° C for 3 h to obtain powder V_2O_5 satisfying the standard, and the content of V and NH_4 + in the vanadium precipitation wastewater was very low, thus simplifying the subsequent wastewater treatment process. The process is suitable for n [Na] / n [V] ≤ 5.0 solution system, the test effect is good.